The hue of hydraulic fluid used in braking systems serves as a visual indicator of its condition and potential contamination. Ideally, this fluid appears as a light, clear amber or honey color when new. This pristine state signifies the absence of moisture, debris, and other contaminants that can compromise its performance.
Maintaining the integrity of this hydraulic medium is crucial for safe and effective braking. Over time, brake fluid absorbs moisture from the atmosphere, leading to a lower boiling point and increased risk of brake fade. The fluid also collects debris from brake components, which can cause internal wear and corrosion. A darkening or discoloration of the fluid often signals the presence of these contaminants and a degradation of its properties, necessitating inspection and potential replacement.